ALLOWANCE FOR CREDIT LOSSES AND RESERVE FOR OFF-BALANCE SHEET CREDIT EXPOSURES (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Changes in the allowance
Beginning balance	$ 59,182	$ 63,934
Provision (credit) for credit losses on loans	3,905	4,121
Subtotal	63,087	68,055
Charge-offs	(3,557)	(5,520)
Recoveries	939	997
Net (charge-offs) recoveries	(2,618)	(4,523)
Ending balance	60,469	63,532
Commercial and Industrial
Changes in the allowance
Beginning balance	7,113	7,181
Provision (credit) for credit losses on loans	719	419
Subtotal	7,832	7,600
Charge-offs	(580)	(682)
Recoveries	171	90
Net (charge-offs) recoveries	(409)	(592)
Ending balance	7,423	7,008
Consumer
Changes in the allowance
Beginning balance	13,269	17,079
Provision (credit) for credit losses on loans	2,450	3,008
Subtotal	15,719	20,087
Charge-offs	(2,977)	(4,838)
Recoveries	755	893
Net (charge-offs) recoveries	(2,222)	(3,945)
Ending balance	13,497	16,142
Construction \| Real Estate
Changes in the allowance
Beginning balance	2,316	4,004
Provision (credit) for credit losses on loans	(34)	(385)
Subtotal	2,282	3,619
Charge-offs	0	0
Recoveries	0	0
Net (charge-offs) recoveries	0	0
Ending balance	2,282	3,619
Residential Mortgage \| Real Estate
Changes in the allowance
Beginning balance	15,267	14,626
Provision (credit) for credit losses on loans	659	1,392
Subtotal	15,926	16,018
Charge-offs	0	0
Recoveries	10	8
Net (charge-offs) recoveries	10	8
Ending balance	15,936	16,026
Home Equity \| Real Estate
Changes in the allowance
Beginning balance	2,335	3,501
Provision (credit) for credit losses on loans	(530)	226
Subtotal	1,805	3,727
Charge-offs	0	0
Recoveries	3	6
Net (charge-offs) recoveries	3	6
Ending balance	1,808	3,733
Commercial Mortgage \| Real Estate
Changes in the allowance
Beginning balance	18,882	17,543
Provision (credit) for credit losses on loans	641	(539)
Subtotal	19,523	17,004
Charge-offs	0	0
Recoveries	0	0
Net (charge-offs) recoveries	0	0
Ending balance	$ 19,523	$ 17,004

Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Net Charge-offs

No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

+ Details

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- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of decrease (increase) in allowance for credit loss on financing receivable from writeoff (recovery). Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

+ Details

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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